Sienna Miller, Jennifer Aniston and Jennifer Lopez partied in sleek LBDs,Twilight’s Robert Pattinson caused hysteria in New York and Beyoncé rocked some seriously hot Louboutin shoes (what pregnancy?!). See all the best celebrity fashion pictures we’re all talking about.

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Robert Pattinson’s Back On The Twilight Promo Trail – Looking Rather Nice We Might Add. Nov ’11

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Robert Pattinson: A Little Bit Smart; A Little Bit Scruffy. We Like It. Nov ’11

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Kate Moss Does Off-Duty Dressing To Perfection. We Really Like The Printed Jeans. Nov ’11

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Celebrity Fashion-Off: Jennifer Lopez And Jennifer Aniston At The US Glamour Awards 2011